Rewrite the following rational expression with a new denominator as indicated. 4/15; 90

How many times larger is 2000 than 2

Hannah made four withdrawals of of $20 from her checking account

Six friends each put $250 into a single account that earns 5.5% annually. The interest earned is added to the account at the end of each year. The friends want to use the money in the account to go on a vacation after four years.

Ralph is 3 times as old as Sara. In 6 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.

What is the median, mode and mean of these following numbers: 28, 26, 27, 30, 32, 34, 31, 30, 26, 30, 36

Consider a regular pyramid where p is the perimeter of the base, s is the slant height, ba is the base area, and la is the lateral area. what is the valid formula for the surface area

320% expressed as a mixed number in simplest form

A ball-shaped like a sphere has a radius of 2.7 cm. Which measurement is closest to the volume of the ball in cubic cm? and tell explanation of the answer.

Find the volume of a right circular cone that has a height of 4.2m and a base with a radius of 3.4m

Our new training room can seat 150 employees. If 6 tables consisting of 6 chairs are now taken, what percentage of our new facility's seating is full?"